While trust is the foundation of a relationship, trust is built on character and credibility. Trust is hard to earn but the good news is, it can also be regained.
I got this quotation from Stephen R. Covey's book The Speed of Trust and I think everyone should practice humility. I constantly remind my staff to be humble. Whatever achievement our department has earned, it is because we work as a team. Humility is not a sign of weakness but in fact it is the courage to control oneself of gloat and self exaltation.